The Government said it would also advertise for a new executive director of Families SA, as well as a replacement for former deputy chief David Waterford.

Mr Waterford resigned last week for "inadvertently misleading" his boss and the Minister over the sexual abuse case.

It was revealed the charged man had been investigated a year ago for alleged improper conduct against a toddler, but the claims could not be substantiated.

Mr Waterford said he had resigned because he fell well short of the standards of a public servant.

Police Commissioner confirms prior investigation

Earlier today Police Commissioner Gary Burns confirmed South Australian police were previously alerted to a concern about the 32-year-old Families SA worker who was recently charged with child sex offences.

It is understood another Families SA worker complained a year ago about alleged inappropriate behaviour between the accused man and a young girl.

Commissioner Burns told 891 ABC Adelaide detectives looked at the complaint and decided it did not warrant further investigation.

"My understanding is this care notification was looked at by detectives and it was determined that there wasn't anything concrete enough to proceed," Commissioner Burns said.

"As a result of the subsequent arrest of this person, that care and concern notification will be picked up in the overall investigations that are continuing now.

"The aim will be to put the police resources in to secure a conviction and therefore prevent the person being involved in more of these type of offences into the future," he said.

Meanwhile Premier Jay Weatherill has released the draft terms of reference for the proposed royal commission into child sexual abuse.

They include looking into the adequacy of existing laws and policies relevant to the state's child protection regime for children at risk of harm, as well as the adequacy of existing practices and procedures adopted by Families SA and other relevant agencies.

Comments on the terms of reference are invited up until close of business of Tuesday August 12 at YourSay.